# Easter date calculation

### Instructions

##### Step one:
• A is quotient obtained by division of the selected year by 100
• B is residual/remainder when dividing selected year by 100
##### Step two
• a = (A + 8) / 25 (discard residual/remainder)
##### Step three
• b = (A + 1 - a) / 3 (discard residual/remainder)
##### Step four
• c = A / 4 (discard residual/remainder)
##### Step five
• d is residual/remainder when dividing selected year by 19
##### Step six
• f is residual/remainder when dividing (11d + 1) by 30
##### Step seven
• g is residual/remainder when dividing (A - b - c - f + 46) by 30
##### Step eight
• h = B / 4 (discard residual/remainder)
##### Step nine
• k is residual/remainder when dividing (5A + B + h + c) by 7
##### Step ten
• m is residual/remainder when dividing (39 - g - k) by 7
##### Step eleven
• If g + m > 9 Easter is on (g + m - 9)[st/nd/rd/th] of April
• If g + m ≤ Easter is on (22 + g - m)[st/nd/rd/th] of March
##### Exceptions:
• If g = 29 and m = 6 Easter is on 19th, not 26th, of April
• If g = 28 and m = 6 Easter is on 18th, not 25th, of April

### You can check your result here

##### Remark:
- next step will be displayed if the result in the current step is correct.

##### Calculate and enter the result in input fields:
• A: quotient in division selected year and 100 (year / 100)
• B: residual/remainder in division year and 100
• a: (A + 8) / 25 (discard residual/remainder)
• b: (A + 1 - a) / 3 (discard residual/remainder)
• c: A / 4
• d: residual/remainder when dividing selected year by 19
• f: residual/remainder when dividing (11d + 1) / 30
• g: residual/remainder when dividing (A - b - c - f + 46) / 30
• h: quotient when dividing B / 4
• k: residual when dividing (5A + B + h + c) / 7
• m: residual/remainder when dividing (39 - g - k) / 7

AKTI ŠKOLE

eTwinning

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